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This patch enables the uart tx/rx fifo. Now that fifo is enabled, the uart read/write functions are modfied to check the UFSTAT register for fifo status instead of UTRSTAT (as required with fifo's enabled). Tested by booting linux kernel. Before enabling tx/rx fifo "Uncompressing linux" message is garbled and after enabling it is proper. Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com> Signed-off-by: Akshay Saraswat <akshay.s@samsung.com> Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>